If your marine toilet has a "Y" valve, what must you do in a No Discharge Zone?

When operating a marine toilet equipped with a "Y" valve in a No Discharge Zone, securing the Y valve in the closed position is necessary for compliance with environmental regulations. No Discharge Zones are areas where the discharge of sewage from boats is prohibited to protect water quality and marine life. By closing the Y valve, you ensure that waste cannot be released into the water, aligning with the rules designed to maintain a clean and safe environment.

This action demonstrates responsible boating practices and adherence to legal requirements intended to prevent pollution. Other options, such as leaving the valve open or using the toilet normally, would result in violating these regulations, while removing the valve is excessive and not typically required. This proper management of the Y valve helps minimize the ecological impact of boating activities.